EP0218263A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Laser information recording medium having an improved recording layer
Assignee: Sony Corp
•
Filing: 1986-10-10
•
Granted: —
•
Expires: 2006-10-10
Abstract
Abstract A laser information recording medium comprising a substrate, a reflective layer and a recording layer. The recording layer is made of cumulative sub-layers of J-aggregates of an organic dye having an absorption band in the wavelength range of oscillation of the laser and an anionic film-forming material. The cumulative sub-layers may be formed by the Langmuir-Blodgett thin film method. The recording layer may also consist of a plurality of layers containing organic dyes having different absorption peaks of wavelength in their respective sub-layers. The organic dyes are preferably cyanine dyes of a specific type and the cationic film-forming material is preferably a mixture of at least two members of the group consisting of dioctadecyldimethylammonium chloride, stearylamine and methyl stearate.
Inventors
- 👤 Coe C/O Sony Corporation Ishimoto
- 👤 Junetsu C/O Sony Corporation Seto
- 👤 Hiroshi C/O Sony Corporation Tomimuro
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 04:20
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/247; G11B7/2472; G11B7/252; G11B7/253; G11B7/2531; G11B7/258; G11B7/2585; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/146
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A laser information recording medium comprising: a substrate, a reflective layer, and a recording layer, said recording layer consisting of cumulated sub-layers of J-aggregates formed from an organic dye having an absorption peak in a laser beam oscillation band and a ionic film-forming material, said organic dye including at least one of the following compounds:
Claim 2
Dependent Claim
55 words
A laser information recording medium comprising: a substrate, a reflective layer, and a recording layer, said recording layer consisting of cumulated sub-layers of J-aggregates formed from an organic dye having an absorption peak in a laser beam oscillation band and a ionic film-forming material, said organic dye including at least one of the following compounds:
Claim 3
Dependent Claim
29 words
A laser information recording medium according to claim-1 wherein said cationic film-forming material consists of at least two members of the following class: dioctadecyldimethylammonium chloride, methyl stearate and stearylamine.
Claim 4
Dependent Claim
31 words
A laser information recording medium according to claim 2, wherein said cationic film-forming material is a mixture of stearylamine and methyl stearate, and said dye is a dye of formula (II).
Claim 5
Dependent Claim
17 words
A laser information recording medium according to claim 1 wherein said anionic film-forming material is arachic acid.
Claim 6
Dependent Claim
26 words
A laser information recording medium according to claim 1 in which said reflective layer and said recording layer are superposed on said substrate in that order.
Claim 7
Dependent Claim
26 words
A laser information recording medium according to claim 1 in which said recording layer and said reflective layer are superposed on said substrate in that order.
Claim 8
Dependent Claim
55 words
A laser information recording medium comprising: a substrate, a reflective layer, and a plurality of recording layers, each recording layer consisting of cumulated layers of J-aggregates formed from an organic dye and a cationic film-forming material, the organic dyes in said cumulated layers having different absorption peaks for wavelengths in a laser beam oscillation band.
Claim 9
Dependent Claim
55 words
A laser information recording medium comprising: a substrate, a reflective layer, and a plurality of recording layers, each recording layer consisting of cumulated layers of J-aggregates formed from an organic dye and a cationic film-forming material, the organic dyes in said cumulated layers having different absorption peaks for wavelengths in a laser beam oscillation band.
Claim 10
Dependent Claim
24 words
A laser information recording medium according to claim 7 wherein said recording layers individually contain a cyanine dye having one of the following formulae:
Claim 11
Dependent Claim
37 words
A laser information recording medium according to claim 7, wherein said cationic film-forming material is a member selected from the group consisting of mixtures of at least two substances of dioctadecyldimethy lammonium chloride, methyl stearate and stearylamine.
Claim 12
Dependent Claim
32 words
A laser information recording medium according to claim 8 wherein said cationic film-forming material is a mixture of dioctadecyldimethylammonium chloride and methyl stearate and said dye is a dye of formula (II).
Claim 13
Dependent Claim
27 words
A laser information recording medium according to claim 8 wherein said anionic film-forming material is arachic acid and said dye is a dye of the formula (III).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.